|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* This file is part of the Metadata package. |
|
4
|
|
|
* |
|
5
|
|
|
* @author Daniel Schröder <[email protected]> |
|
6
|
|
|
*/ |
|
7
|
|
|
|
|
8
|
|
|
namespace GravityMedia\Metadata\ID3v2\Reader; |
|
9
|
|
|
|
|
10
|
|
|
use GravityMedia\Metadata\Exception\RuntimeException; |
|
11
|
|
|
use GravityMedia\Metadata\ID3v2\Enum\HeaderFlag; |
|
12
|
|
|
use GravityMedia\Metadata\ID3v2\Enum\Version; |
|
13
|
|
|
use GravityMedia\Metadata\ID3v2\Header; |
|
14
|
|
|
use GravityMedia\Metadata\ID3v2\Stream\SynchsafeInteger32Reader; |
|
15
|
|
|
use GravityMedia\Metadata\Metadata\HeaderInterface; |
|
16
|
|
|
use GravityMedia\Stream\Enum\ByteOrder; |
|
17
|
|
|
use GravityMedia\Stream\Reader\Integer8Reader; |
|
18
|
|
|
use GravityMedia\Stream\StreamInterface; |
|
19
|
|
|
|
|
20
|
|
|
/** |
|
21
|
|
|
* ID3v2 header reader |
|
22
|
|
|
* |
|
23
|
|
|
* @package GravityMedia\Metadata\ID3v2\Reader |
|
24
|
|
|
*/ |
|
25
|
|
|
class HeaderReader |
|
26
|
|
|
{ |
|
27
|
|
|
/** |
|
28
|
|
|
* @var StreamInterface |
|
29
|
|
|
*/ |
|
30
|
|
|
protected $stream; |
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* @var Integer8Reader |
|
34
|
|
|
*/ |
|
35
|
|
|
protected $integer8Reader; |
|
36
|
|
|
|
|
37
|
|
|
/** |
|
38
|
|
|
* @var SynchsafeInteger32Reader |
|
39
|
|
|
*/ |
|
40
|
|
|
protected $synchsafeInteger32Reader; |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* Create ID3v2 header reader. |
|
44
|
|
|
* |
|
45
|
|
|
* @param StreamInterface $stream |
|
46
|
|
|
*/ |
|
47
|
|
|
public function __construct(StreamInterface $stream) |
|
48
|
|
|
{ |
|
49
|
|
|
$this->stream = $stream; |
|
50
|
|
|
} |
|
51
|
|
|
|
|
52
|
|
|
/** |
|
53
|
|
|
* Get 8-bit integer reader. |
|
54
|
|
|
* |
|
55
|
|
|
* @return Integer8Reader |
|
56
|
|
|
*/ |
|
57
|
|
|
public function getInteger8Reader() |
|
58
|
|
|
{ |
|
59
|
|
|
if (null === $this->integer8Reader) { |
|
60
|
|
|
$this->integer8Reader = new Integer8Reader($this->stream); |
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
|
|
return $this->integer8Reader; |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
|
|
/** |
|
67
|
|
|
* Get synchsafe 32-bit integer reader |
|
68
|
|
|
* |
|
69
|
|
|
* @return SynchsafeInteger32Reader |
|
70
|
|
|
*/ |
|
71
|
|
View Code Duplication |
public function getSynchsafeInteger32Reader() |
|
|
|
|
|
|
72
|
|
|
{ |
|
73
|
|
|
if (null === $this->synchsafeInteger32Reader) { |
|
74
|
|
|
$this->synchsafeInteger32Reader = new SynchsafeInteger32Reader($this->stream); |
|
75
|
|
|
$this->synchsafeInteger32Reader->setByteOrder(ByteOrder::BIG_ENDIAN); |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
return $this->synchsafeInteger32Reader; |
|
79
|
|
|
} |
|
80
|
|
|
|
|
81
|
|
|
/** |
|
82
|
|
|
* Read ID3v2 header version. |
|
83
|
|
|
* |
|
84
|
|
|
* @throws RuntimeException An exception is thrown on invalid versions. |
|
85
|
|
|
* |
|
86
|
|
|
* @return int |
|
87
|
|
|
*/ |
|
88
|
|
|
protected function readVersion() |
|
89
|
|
|
{ |
|
90
|
|
|
$this->stream->seek(3); |
|
91
|
|
|
switch ($this->getInteger8Reader()->read()) { |
|
92
|
|
|
case 2: |
|
93
|
|
|
return Version::VERSION_22; |
|
94
|
|
|
case 3: |
|
95
|
|
|
return Version::VERSION_23; |
|
96
|
|
|
case 4: |
|
97
|
|
|
return Version::VERSION_24; |
|
98
|
|
|
} |
|
99
|
|
|
|
|
100
|
|
|
throw new RuntimeException('Invalid version.'); |
|
101
|
|
|
} |
|
102
|
|
|
|
|
103
|
|
|
/** |
|
104
|
|
|
* Read ID3v2 header revision. |
|
105
|
|
|
* |
|
106
|
|
|
* @return int |
|
107
|
|
|
*/ |
|
108
|
|
|
protected function readRevision() |
|
109
|
|
|
{ |
|
110
|
|
|
$this->stream->seek(4); |
|
111
|
|
|
|
|
112
|
|
|
return $this->getInteger8Reader()->read(); |
|
113
|
|
|
} |
|
114
|
|
|
|
|
115
|
|
|
/** |
|
116
|
|
|
* Read ID3v2 header flags. |
|
117
|
|
|
* |
|
118
|
|
|
* @param int $version |
|
119
|
|
|
* |
|
120
|
|
|
* @return array |
|
121
|
|
|
*/ |
|
122
|
|
|
protected function readFlags($version) |
|
123
|
|
|
{ |
|
124
|
|
|
$this->stream->seek(5); |
|
125
|
|
|
$flags = $this->getInteger8Reader()->read(); |
|
126
|
|
|
|
|
127
|
|
View Code Duplication |
if ($version === Version::VERSION_22) { |
|
|
|
|
|
|
128
|
|
|
return [ |
|
129
|
|
|
HeaderFlag::FLAG_UNSYNCHRONISATION => (bool)($flags & 0x80), |
|
130
|
|
|
HeaderFlag::FLAG_COMPRESSION => (bool)($flags & 0x40) |
|
131
|
|
|
]; |
|
132
|
|
|
} |
|
133
|
|
|
|
|
134
|
|
View Code Duplication |
if ($version === Version::VERSION_23) { |
|
|
|
|
|
|
135
|
|
|
return [ |
|
136
|
|
|
HeaderFlag::FLAG_UNSYNCHRONISATION => (bool)($flags & 0x80), |
|
137
|
|
|
HeaderFlag::FLAG_EXTENDED_HEADER => (bool)($flags & 0x40), |
|
138
|
|
|
HeaderFlag::FLAG_EXPERIMENTAL_INDICATOR => (bool)($flags & 0x20) |
|
139
|
|
|
]; |
|
140
|
|
|
} |
|
141
|
|
|
|
|
142
|
|
|
return [ |
|
143
|
|
|
HeaderFlag::FLAG_UNSYNCHRONISATION => (bool)($flags & 0x80), |
|
144
|
|
|
HeaderFlag::FLAG_EXTENDED_HEADER => (bool)($flags & 0x40), |
|
145
|
|
|
HeaderFlag::FLAG_EXPERIMENTAL_INDICATOR => (bool)($flags & 0x20), |
|
146
|
|
|
HeaderFlag::FLAG_FOOTER_PRESENT => (bool)($flags & 0x10) |
|
147
|
|
|
]; |
|
148
|
|
|
} |
|
149
|
|
|
|
|
150
|
|
|
/** |
|
151
|
|
|
* Read ID3v2 header size. |
|
152
|
|
|
* |
|
153
|
|
|
* @return int |
|
154
|
|
|
*/ |
|
155
|
|
|
public function readSize() |
|
156
|
|
|
{ |
|
157
|
|
|
$this->stream->seek(6); |
|
158
|
|
|
|
|
159
|
|
|
return $this->getSynchsafeInteger32Reader()->read(); |
|
160
|
|
|
} |
|
161
|
|
|
|
|
162
|
|
|
/** |
|
163
|
|
|
* Read ID3v2 header. |
|
164
|
|
|
* |
|
165
|
|
|
* @return HeaderInterface |
|
166
|
|
|
*/ |
|
167
|
|
|
public function read() |
|
168
|
|
|
{ |
|
169
|
|
|
$version = $this->readVersion(); |
|
170
|
|
|
|
|
171
|
|
|
$header = new Header($version); |
|
172
|
|
|
return $header |
|
173
|
|
|
->setRevision($this->readRevision()) |
|
174
|
|
|
->setFlags($this->readFlags($version)) |
|
175
|
|
|
->setSize($this->readSize()); |
|
176
|
|
|
} |
|
177
|
|
|
} |
|
178
|
|
|
|
GravityMedia /
Metadata
Loading history...
Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation.
You can also find more detailed suggestions in the “Code” section of your repository.